On June 26, Khloe Kardashian happily celebrated her birthday in New York City with boyfriend French Montana and mom Kris Jenner — just one day after news broke that a Boston radio station intern claimed she had to physically fight Montana off after he asked her for sex on his tour bus!

23-year-old Mariela Sanchez spoke with Star exclusively about her dramatic encounter with the rapper. “Honestly, I was really scared by how he pursued me and how aggressive he was toward me,” she admits. “It got kind of frightening.”

The incident happened on June 21, while the reality star was in California with her family, and her new beau was 3,000 miles away at Centro Nightclub in a Boston suburb. “I was hoping to get an interview with French for my blog [marielaasanchez.blogspot.com],” Mariela says. “There were already a ton of girls partying up there, and when his manager mentioned my request for an interview, French said, ‘Okay…but first I have to interview her!”

Shortly after, Mariela says French invited her on his tour bus to conduct the interview. “There were three other girls, but French kicked them off and told them if they wanted to come to his hotel, they had to follow the bus on their own,” she explains. “French was visibly drunk and continued drinking for the rest of the ride; he didn’t say much to me.” Once the pair arrived at the hotel, the rapper’s entourage left him and the 23-year-old alone.

“He took my phone away and suddenly climbed on top of me,” Mariela recalls. “He offered to fly me out to New York whenever I wanted to come and asked me why I would want to have sex with the ‘broke guys’ from around the area instead of having sex with him.”

She says French did admit he had a girlfriend, but never mentioned Khloe by name. “French was still on top of me. I asked him to get off, but he wouldn’t move — and then I felt him lick my ear,” she details. “That’s when I had enough, and I had to push him at least two or three times to break away.”

Even after Mariela finally escaped and got her phone back, she claims three other women entered the lobby and made their way toward French’s room. “A friend of his said, ‘Wow! French is about to get down with some scrappers!'” she remembers.

Still, Khloe seems to be blinded by her new man’s betrayal. “She’s a strong woman, but she needs to be smarter about who she dates,” Mariela concludes. “If I could tell Khloe one thing, it would be to open her eyes and use the brain her mother blessed her with.”